Composite building block



Dec. 31, 1957 R. M. ANGELINI 2,817,965

COMPOSITE BUILDING- BLOCK Filed June 13, 1955 UnitedStates Patent O COMPOSITE BUILDING BLOCK Roger M. Angelini, Leominster, Mass.

Application June 13, 1955, Serial No. 515,114

2 Claims. (Cl. 72--44) This invention relates to a new and improved composite building block, and the principal object of the `1nvention resides in the provision of a two-part building block made of cement or concrete, the parts thereof being separated to provide an air space between them, so that when a wall is built, there will be a continuous air space between an outer wall and an inner wall, and .the inner wall may be used for direct plastering, furnng, etc., whereby building costs will be greatly reduced while at the same time also greatly improved due to the insulation of the air space and the fact that it acts as a moisture trap, preventing any leakage from the exterior to the interior of the wall. This application is a continuationn-part of application Serial No. 438,981, tiled June 24, 1954, now abandoned.

Other objects of the invention reside in the prov1s1on of a composite building block as above described wherem there is a special new and improved connecting means for the blocks and each block is provided with a slot, said connecting means including a resilient wire clip `or the like to be placed and held in the slots in pairs by the mason as he lays the wall.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which- Fig. l is a perspective view of one part of the composite block;

Fig. 2 is a perspective view of a connecting device;

Fig. 3 is a diagrammatic view illustrating the application of the connecting device to two block parts;

Fig. 4 is a view similar to Fig. 3 illustrating the blocks in connected position;

Fig. 5 is a plan view of Fig. 4; and

Fig. 6 is an enlarged plan view showing one of the slots.

In carrying out the present invention, there are provided two similar block parts 10 and 12, each of which is formed more or less in the usual manner in a cement block-making machine. Each block is provided with one or more top-opening, downwardly-tapering slots generally indicated at 16, said slots having undercut portions 18 in the body of the block, as clearly shown in Fig. 1.

The block l2 is the same as block 10 and when the wall is being built, the mason arranges the blocks in two rows with the slots facing each other as indicated in Figs..

3, 4 and 5, leaving the air space as shown between.

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A separate resilient wire or like clip connecting member is used to hold the blocks together and this clip il shown in Fig. 2. The main portions of the clip comprise the U or V shaped bent wire members 20, each member having a leg with a free end as at 22, the other leg having the connections 24 overlying the gap between the legs 20 by reason of the offsets 26. Another bar 28 similar to that at 24 is provided at the closed end portions of members 20.

With the blocks as shown in Fig. 3, the mason takes the clip of Fig. 2 and inserts it simultaneously in the two blocks entering the compressible legs 20, 20 in the undercut portions 18 of the slots as is clearly apparent from a comparison of Figs. 3, 4 and 5.

With the connector clip pushed down to the position shown in Fig. 4, the next course of blocks is laid thereon and the connecting or inter-laying cement closes the tops of the slots indicated by the reference numeral 30 in Fig. 4, so that a solid wall s formed without the necessity for providing molded embedded strengthening connecting members and the mason performs the operations on the job as described above.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A cement building block comprising a plurality of block parts each having a top, a bottom, and side and end surfaces, and means to hold the parts together in spaced relation, a tapering downward recess in each block part, each recess intersecting the top and one side surface of its block part, each recess being undercut along the side surface, said means comprising a bent bar having vertical U-shaped end portions in parallel planes and an upper horizontal portion extending between the upper ends of a leg of each end portion and a horizontal bar connecting the lower parts of the end portions, with the upper ends of the other legs being free for spring movement towards the first-named legs, and said end portions being insertable in the respective recesses and held therein in the undercut portions thereof by reason of the spring movement of said other legs and with the upper horizontal portion and the horizontal bar extending between the block parts and spacing the same in fixed relation with respect to each other.

2. The building block of claim l wherein the recesses terminate short of the bottom of the respective block part.

References Cited in the tile of this patent UNITED STATES PATENTS 1,329,893 Flynn Feb. 3, 1920 1,962,906 Mueller June 12, 1934 2,137,759 Martin Nov. 22, 1938 2,191,217 Liebowitz Feb. 20, 1940 2,311,479 Shugart Feb. 16, 1943 2,647,392 Wilson Aug. 4, 1953 FOREIGN PATENTS 125,336 Australia 1947 928,737 France 1947 70.229 Holland 1952 

